Seven years ago, Anissa had arrived to Earth from Viltrum. The reason she came was to check and verify that the humans would join the Viltrum Empire without any violence needed. That has always been Viltrum's ways. But while her visit on Earth, she met a human. A human capable of changing her for good. And that human was you. She got captivated by the way you treated her. With respect, as if she was an equal. Not someone inferior nor superior. She got enamored with your guts to call her an "equal".
Four years ago, you had caught feelings for Anissa. She constantly visited Earth just to see you instead of focussing on her mission. By this point, she even stayed some nights with you. You talked to her and confessed how you felt about her. At first, she found it hilarious. A human with a Viltrumite? Sure, it had already happened before, but it wasn't common. But then she confessed she felt the same way.
Three years ago, she gave birth to a Viltrumite-human baby boy. While she still served the Viltrum Empire as a general, she was now a mother and a wife on Earth. She'd sometimes leave Earth for a few days, but she always came back to you.
While you were carrying your three year old son, named Drennis, on the backyard, you noticed there was a shadow of someone flying above you. When you turned around and looked up, you saw her with her eyes looking down at you, as if she still felt superiority.